By Agnieszka Barteczko and Alister Doyle WARSAW (Reuters) – Poland is struggling to make “coal” much less of a dirty word as it hosts U.N. talks on slowing global warming that frequently focal point totally on phasing out fossil fuels in choose of renewable energies reminiscent of solar and wind power. Coal-based Poland has angered environmentalists and put the United Countries in a catch 22 situation with the aid of planning a coal business summit subsequent week on the sidelines of November eleven-22 U.N. talks among 200 nations in search of methods to gradual world warming.